Unit 1: Ecology Guided Notes Name: Honors Biology Date: Per:

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1 Unit1:EcologyGuidedNotes Name: HonorsBiology Date: Per: CharacteristicsandOrganizationofLife Biology Biology Ecology CharacteristicsofLife Livingthingsare Livingthings Livingthings Livingthings Livingthings Livingthings Livingthings LevelsofOrganization

2 Organism Population Species Community Ecosystem Biome Biosphere Bioticvs.AbioticFactors 2

3 BioticFactors Bioticfactorsare Examples: AbioticFactors Abioticfactorsare Examples: Biotic Abiotic Biodiversity 3

4 Biodiversity Biodiversity Containstwocomponents: Speciesrichness Speciesabundance Biodiversityisameasureofthe LessDiverseEcosystem+Disease MoreDiverseEcosystem+Disease BiodiversityisBeneficialtoHumans ThreatstoBiodiversity EnergySourcesinanEcosystem 4

5 Organicvs.InorganicMatter InorganicMatter Includes Containonly Inorganiccompoundsusuallydonotcontain OrganicMatter Includes Contain Organiccompoundsalwaysincludealotof Carboncompoundsformthe Autotrophs Alsocalled Useenergyfromtheenvironmentto TwoKindsofAutotrophs 5

6 PhotosyntheticAutotrophs Use Photosynthesis processofusing Photosyntheticorganismsneedaccessto Liveon Examples: ChemosyntheticAutotrophs Use Chemosynthesis usingthe Chemosyntheticorganismsdonotneedaccessto Liveinthe Examples: Heterotrophs 6

7 Alsocalled Allheterotrophsrelyon FiveKindsofHeterotrophs Herbivores Obtainenergybyeating Examples: Carnivores Obtainenergybyeating Examples: Omnivores Obtainenergybyeating Examples: Detritivores Obtainenergybyeating Examples: Decomposers Obtainenergyby Examples: EnergyFlowinanEcosystem 7

8 FeedingRelationships Energyinanecosystemflowsinonlyonedirection: Arrowsinafeedingrelationshipdiagramalways FoodChains Foodchainsareaseriesofstepsinwhich ExampleofaFoodChain: FoodWebs Foodwebslinkmultiple ExampleofaFoodWeb: TrophicLevels 8

9 TrophicLevels Producers Always PrimaryConsumers The Canbeabbreviated: SecondaryConsumers The Canbeabbreviated: TertiaryConsumers The Almostalwaysexclusively Canbeabbreviated: Usuallythehighestlevelpossibleduetoincompleteenergytransferfromone trophicleveltothenext EcologicalPyramids 9

10 EnergyPyramids Energypyramidsrepresentthe Onlyabout10%oftheenergyavailablewithinonetrophiclevelistransferredtoorganisms atthenexttrophiclevelbecausethe Usesofenergyinclude: BiomassPyramid 10

11 Biomassisthetotalamountof Biomassisexpressedinunitsof Biomassrepresentstheamountof Biomasslikeenergyusuallydecreasesby RelationshipsBetweenOrganisms 11

12 Predator PreyInteractions Predation Predator Prey Example: Symbiosis Anyrelationshipinwhich Threetypesofsymbioticrelationships: Mutualism Example: Commensalism Oneorganism Example: Parasitism Oneorganism The The Example: NichesandInvasiveSpecies 12

13 Niches Anicheisthe Anicheincludesacombinationofbioticandabioticfactorssuchas: Its Therangeof Thetype Howit Its Whenitis Howandwhenit InvasiveSpecies Invasivespeciesareorganismsthat Theyaremovedintoanareaby Becausetheyhave Theyareathreattothebiodiversityoftheareabecause Examples: EcologicalSuccession 13

14 EcologicalSuccession Aseriesof Ecosystemsareconstantly PrimarySuccession Occurson Pioneerspecies The Usuallyalichen A Eventuallyonceenoughsoilandorganicmatterhasaccumulatedthat SecondarySuccession Occurswhennaturaleventssuchas CyclesinNature 14

15 BiogeochemicalCycles Unliketheonewayflowofenergy, Matteriscycledbetween TheWaterCycle Evaporation Transpiration Condensation Precipitation Runoff TheCarbonCycle 15

16 Photosynthesis Respiration Decomposition TheNitrogenCycle 16

17 NitrogenFixation Nitrogenmovesfrom Decomposers 17

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